Primal codes of canonical finite permutations on positive integers.

Terms

a(0) =1a(1) =2a(2) =12a(3) =18a(4) =360a(5) =540a(6) =600a(7) =1350a(8) =1500a(9) =2250a(10) =75600a(11) =105840a(12) =113400a(13) =126000a(14) =158760a(15) =246960a(16) =283500a(17) =294000a(18) =315000a(19) =411600a(20) =472500a(21) =555660a(22) =735000a(23) =864360a(24) =992250a(25) =1296540a(26) =1389150a(27) =1440600a(28) =1653750a(29) =2572500